Python 3获取和解析JSON API

Question

如何用python解析json api响应？ 我现在有这个：

import urllib.request
import json

url = 'https://hacker-news.firebaseio.com/v0/topstories.json?print=pretty'

def response(url):
    with urllib.request.urlopen(url) as response:
        return response.read()

res = response(url)
print(json.loads(res))

我得到这个错误： TypeError:JSON对象必须是str，而不是'bytes'

处理json api的pythonic方法是什么？

Answer 1

版本1:（在运行脚本之前执行pip install requests）

import requests
r = requests.get(url='https://hacker-news.firebaseio.com/v0/topstories.json?print=pretty')
print(r.json())

版本2:（在运行脚本之前执行pip install wget）

import wget

fs = wget.download(url='https://hacker-news.firebaseio.com/v0/topstories.json?print=pretty')
with open(fs, 'r') as f:
    content = f.read()
print(content)

Answer 2

您可以使用标准库python3：

import urllib.request
import json
url = 'http://www.reddit.com/r/all/top/.json'
req = urllib.request.Request(url)

##parsing response
r = urllib.request.urlopen(req).read()
cont = json.loads(r.decode('utf-8'))
counter = 0

##parcing json
for item in cont['data']['children']:
    counter += 1
    print("Title:", item['data']['title'], "\nComments:", item['data']['num_comments'])
    print("----")

##print formated
#print (json.dumps(cont, indent=4, sort_keys=True))
print("Number of titles: ", counter)

输出如下：

...
Title: Maybe we shouldn't let grandma decide things anymore.  
Comments: 2018
---- 
Title: Carrie Fisher and Her Stunt Double Sunbathing on the Set of Return of The Jedi, 1982  
Comments: 880
---- 
Title: fidget spinner  
Comments: 1537
---- 
Number of titles:  25

Answer 3

我通常将requests包与json包一起使用。以下代码应适合您的需要：

import requests
import json

url = 'https://hacker-news.firebaseio.com/v0/topstories.json?print=pretty'
r = requests.get(url)
print(json.loads(r.content))

输出

[11008076, 
 11006915, 
 11008202,
 ...., 
 10997668,
 10999859,
 11001695]